fn main() {
    //mkdir 03-macros
    // cd 03-macros
    // git init
    // touch README.md
    // git add README.md
    // git commit -m "first commit"
    // git remote add origin git@gitee.com:gao-rust-bootcamp/03-macros.git
    // git push -u origin "master"
    println!("Hello, world!");
    println!("dddd");
}
